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package web
import (
"encoding/base64"
"fmt"
"io/ioutil"
"log"
"net/http"
"strconv"
"strings"
"time"
"adammathes.com/neko/api"
"adammathes.com/neko/config"
rice "github.com/GeertJohan/go.rice"
"golang.org/x/crypto/bcrypt"
)
func indexHandler(w http.ResponseWriter, r *http.Request) {
serveBoxedFile(w, r, "ui.html")
}
func imageProxyHandler(w http.ResponseWriter, r *http.Request) {
imgURL := strings.TrimPrefix(r.URL.Path, "/")
if imgURL == "" {
http.Error(w, "no image url provided", http.StatusNotFound)
return
}
decodedURL, err := base64.URLEncoding.DecodeString(imgURL)
if err != nil {
http.Error(w, "invalid image url", http.StatusNotFound)
return
}
// pseudo-caching
if r.Header.Get("If-None-Match") == string(decodedURL) {
w.WriteHeader(http.StatusNotModified)
return
}
if r.Header.Get("Etag") == string(decodedURL) {
w.WriteHeader(http.StatusNotModified)
return
}
// grab the img
c := &http.Client{
Timeout: 5 * time.Second,
}
request, err := http.NewRequest("GET", string(decodedURL), nil)
if err != nil {
http.Error(w, "failed to proxy image", 404)
return
}
userAgent := "neko RSS Reader Image Proxy +https://github.com/adammathes/neko"
request.Header.Set("User-Agent", userAgent)
resp, err := c.Do(request)
if err != nil {
http.Error(w, "failed to proxy image", 404)
return
}
bts, err := ioutil.ReadAll(resp.Body)
if err != nil {
http.Error(w, "failed to read proxy image", 404)
return
}
w.Header().Set("ETag", string(decodedURL))
w.Header().Set("Cache-Control", "public")
w.Header().Set("Expires", time.Now().Add(48*time.Hour).Format(time.RFC1123))
w.Write(bts)
}
var AuthCookie = "auth"
var SecondsInAYear = 60 * 60 * 24 * 365
func loginHandler(w http.ResponseWriter, r *http.Request) {
switch r.Method {
case "GET":
serveBoxedFile(w, r, "login.html")
case "POST":
password := r.FormValue("password")
if password == config.Config.DigestPassword {
v, _ := bcrypt.GenerateFromPassword([]byte(password), 0)
c := http.Cookie{Name: AuthCookie, Value: string(v), Path: "/", MaxAge: SecondsInAYear, HttpOnly: false}
http.SetCookie(w, &c)
http.Redirect(w, r, "/", 307)
} else {
http.Error(w, "bad login", 401)
}
default:
http.Error(w, "nope", 500)
}
}
func logoutHandler(w http.ResponseWriter, r *http.Request) {
c := http.Cookie{Name: AuthCookie, MaxAge: 0, Path: "/", HttpOnly: false}
http.SetCookie(w, &c)
fmt.Fprintf(w, "you are logged out")
}
func Authenticated(r *http.Request) bool {
pc, err := r.Cookie("auth")
if err != nil {
return false
}
err = bcrypt.CompareHashAndPassword([]byte(pc.Value), []byte(config.Config.DigestPassword))
return err == nil
}
func AuthWrap(wrapped http.HandlerFunc) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
if Authenticated(r) {
wrapped(w, r)
} else {
http.Redirect(w, r, "/login/", 307)
}
}
}
func AuthWrapHandler(wrapped http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if Authenticated(r) {
wrapped.ServeHTTP(w, r)
} else {
http.Redirect(w, r, "/login/", 307)
}
})
}
func serveBoxedFile(w http.ResponseWriter, r *http.Request, filename string) {
box := rice.MustFindBox("../static")
ui, err := box.Open(filename)
if err != nil {
panic(err)
}
fi, _ := ui.Stat()
http.ServeContent(w, r, filename, fi.ModTime(), ui)
}
func apiLoginHandler(w http.ResponseWriter, r *http.Request) {
username := r.FormValue("username")
password := r.FormValue("password")
// support JSON body as well
if username == "" && password == "" {
// try parsing json
/*
type loginReq struct {
Username string `json:"username"`
Password string `json:"password"`
}
// left as todo for now as we can use form data from fetch too
*/
}
if password == config.Config.DigestPassword {
v, _ := bcrypt.GenerateFromPassword([]byte(password), 0)
c := http.Cookie{Name: AuthCookie, Value: string(v), Path: "/", MaxAge: SecondsInAYear, HttpOnly: false}
http.SetCookie(w, &c)
w.Header().Set("Content-Type", "application/json")
fmt.Fprintf(w, `{"status":"ok"}`)
} else {
http.Error(w, `{"status":"error", "message":"bad login"}`, 401)
}
}
func apiAuthStatusHandler(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
if Authenticated(r) {
fmt.Fprintf(w, `{"status":"ok", "authenticated":true}`)
} else {
w.WriteHeader(http.StatusUnauthorized)
fmt.Fprintf(w, `{"status":"error", "authenticated":false}`)
}
}
func Serve() {
box := rice.MustFindBox("../static")
staticFileServer := http.StripPrefix("/static/", http.FileServer(box.HTTPBox()))
http.Handle("/static/", staticFileServer)
// New Frontend
http.Handle("/v2/", http.StripPrefix("/v2/", http.HandlerFunc(ServeFrontend)))
// New REST API
apiRouter := api.NewRouter()
http.Handle("/api/", http.StripPrefix("/api", AuthWrapHandler(apiRouter)))
// Legacy routes for backward compatibility
http.HandleFunc("/stream/", AuthWrap(api.HandleStream))
http.HandleFunc("/item/", AuthWrap(api.HandleItem))
http.HandleFunc("/feed/", AuthWrap(api.HandleFeed))
http.HandleFunc("/tag/", AuthWrap(api.HandleCategory))
http.HandleFunc("/export/", AuthWrap(api.HandleExport))
http.HandleFunc("/crawl/", AuthWrap(api.HandleCrawl))
http.Handle("/image/", http.StripPrefix("/image/", AuthWrap(imageProxyHandler)))
http.HandleFunc("/login/", loginHandler)
http.HandleFunc("/logout/", logoutHandler)
http.HandleFunc("/api/login", apiLoginHandler)
http.HandleFunc("/api/auth", apiAuthStatusHandler)
http.HandleFunc("/", AuthWrap(indexHandler))
log.Fatal(http.ListenAndServe(":"+strconv.Itoa(config.Config.Port), nil))
}
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